Nut-lock.



.l. R. FORMBY.

NUT LOCK.

APPLICATION FILED APR-2B, 1914.

1 1% @7%o Patented May 25, 1915.

6 10 d, MIN

WH/neoow THE NORRIS PETERS CO. PHOTC-LITHtl, WASHINGTUN. I C.

JOHN R. FORMBY, OF LOG-TOWN, MISSISSIPPI.

NUT-LOCK.

Specification of Letters Patent.

Patented May 25, 1915.

Application filed April 28, 1914.. Serial No. 835,006.

To all whom it may concern:

Be it known that I, JOHN R. FORMBY, a citizen of the United States,residing at Logtown, in the county of Hancock and State of Mississippi,have invented new and useful Improvements in Nut-Locks, of which thefollowing is a specification.

This invention relates to improvements in nut locks and especially withreference to the provision of a spring projecting looking stud carriedby a nut and a washer for arrangement under the nut and having radialgrooves on opposite sides so that one of the grooves on the side of thewasher next the nut may be engaged by the locking stud and the othergrooves engaged with the beam or piece of timber on which the nut andits bolt are used and hence prevented from turning, the inventionconsisting in the construction, combination and arrangement of deviceshereinafter described and claimed.

In the accompanying drawings :Figure l is a plan of a bolt and nutprovided with nut locking devices in accordance with my invention. Fig.2 is a side elevation of the same in use. Fig. 3 is a sectional view ofthe same on a plane coincident with the locking stud.

For the purposes of this specification a bolt is indicated at 1. The nut2 is provided with a bore 3 which extends from its outer face to itsinner face and is arranged near its corner, the inner portion of thebore being enlarged as at 4a. In the outer side of the nut is a diagonalgroove 5 which is coincident with the outer end of the bore. A lockingstud 6 is arranged in the enlarged portion of the bore and has a stem 7which passes through the smaller portion of the bore, the outer end ofsaid stem being arranged in the groove 5 and having a transverse openingwhich is engaged by a split key 8 which is arranged in said groove. A.spring 9 is arranged in the enlarged portion of the bore and bears onthe stud 6 to project the latter normally beyond the inner face of thenut. This inner end of the stud is beveled to form an engaging edge 9*.A washer 10 is arranged on the bolt to bear on the beam, timber or otherwood B in which Copies of this patent may be obtained for the bolt isused. This washer is provided in each side with radial grooves 11 eachof which has a nearly vertical wall 12 and an inclined wall or bottom13, the grooves being obtuse angled in cross section. The grooves onopposite sides of the washer are arranged in reverse order. The washerbears between the work and the nut and when the latter is screwed up onthe bolt the stud 6 engages one of the outer grooves, thereby lockingthe nut in place. The pressure of the washer on the work causes thewasher to be partly embedded in the substance of the work so that itsinner grooves are engaged by the work and thereby the w asher is heldagainst being turned and the nut is securely fastened in place. T 0release the nut the stud 6 should be first drawn out of engagement withthe groove washer, against the tension of its spring and the nut maythen be readily turned.

Having thus described my invention, I olaim:

A nut having a bore extending therethrough from its inner face to itsouter face, the inner portion of said bore being enlarged and the nutbeing further provided, in its outer face, with a groove communicatingwith the outer end of the bore, a locking stud arranged in the enlargedportion of the bore and having a stem extending through the smallerportion of the bore and projecting into the groove, a coiled spring onthe stem of the stud and bearing between the inner side thereof and theinner end of the enlarged portion of the bore, said spring serving toproject the outer end of the stud, and a key arranged in the groove andextending through an opening in the projecting portion of the stem, incombination with a washer for arrangement between the nut and the workand having grooves for engagement by the stud to lock the nut and alsohaving radial grooves on the other side each presenting a biting edge.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN R. FORMBY.

Witnesses:

AUG. Jonns, N. II. LAWRENCE.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

